Numbers 23:10 (KJV)

And the LORD put a word in Balaam's mouth, and said, Return unto Balak, and thus thou shalt speak.

And he returned unto him, and, lo, he stood by his burnt sacrifice, he, and all the princes of Moab.

And he took up his parable, and said, Balak the king of Moab hath brought me from Aram, out of the mountains of the east, saying, Come, curse me Jacob, and come, defy Israel.

How shall I curse, whom God hath not cursed? or how shall I defy, whom the LORD hath not defied?

For from the top of the rocks I see him, and from the hills I behold him: lo, the people shall dwell alone, and shall not be reckoned among the nations.

And Balak said unto Balaam, What hast thou done unto me? I took thee to curse mine enemies, and, behold, thou hast blessed them altogether.

And he answered and said, Must I not take heed to speak that which the LORD hath put in my mouth?

And Balak said unto him, Come, I pray thee, with me unto another place, from whence thou mayest see them: thou shalt see but the utmost part of them, and shalt not see them all: and curse me them from thence.

And he brought him into the field of Zophim, to the top of Pisgah, and built seven altars, and offered a bullock and a ram on every altar.

And he said unto Balak, Stand here by thy burnt offering, while I meet the LORD yonder.